Earthquake with magnitude of ML 1.8 on date 04-07-2020 and time 10:48:59 (UTC) in region 1 km E Casola Valsenio (RA)

A magnitude ML 1.8 earthquake occured in region: 1 km E Casola Valsenio (RA), on

  • 04-07-2020 10:48:59 (UTC)
  • 04-07-2020 12:48:59 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.22, 11.63 at 28 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Casola Valsenio RA 1 2617 2617
Borgo Tossignano BO 7 3288 5905
Fontanelice BO 7 1943 7848
Casalfiumanese BO 8 3438 11286
Riolo Terme RA 9 5720 17006
Castel del Rio BO 10 1246 18252
Brisighella RA 11 7639 25891
Palazzuolo sul Senio FI 14 1154 27045
Modigliana FC 15 4560 31605
Dozza BO 15 6652 38257
Imola BO 16 69797 108054
Marradi FI 17 3139 111193
Castel Bolognese RA 17 9554 120747
Tredozio FC 19 1212 121959
Castel San Pietro Terme BO 20 20811 142770

Municipalities with at least 50000 inhabitants

An earthquake occurred to
16 Km SW of Imola (69797 inhabitants)
21 Km W of Faenza (58541 inhabitants)
33 Km W of Forlì (117913 inhabitants)
38 Km SE of Bologna (386663 inhabitants)
50 Km W of Cesena (96758 inhabitants)
50 Km W of Ravenna (159116 inhabitants)
57 Km NE of Prato (191150 inhabitants)
59 Km NE of Firenze (382808 inhabitants)
63 Km NE of Scandicci (50609 inhabitants)
66 Km E of Pistoia (90315 inhabitants)
68 Km S of Ferrara (133155 inhabitants)
73 Km SE of Modena (184973 inhabitants)
77 Km W of Rimini (147750 inhabitants)
86 Km SE of Carpi (70699 inhabitants)
87 Km N of Arezzo (99543 inhabitants)
95 Km S of Rovigo (51867 inhabitants)
95 Km SE of Reggio nell'Emilia (171345 inhabitants)
100 Km E of Lucca (89046 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.8 2020-07-04
10:48:59
44.23 11.63 28 2020-07-04
10:55:46
Sala Sismica INGV-Roma 80771271
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-07-04 10:48:59 ± 0.3
Latitude 44.23 ± 0.01
Longitude 11.63 ± 0.01
Depth (km) 28 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 80771271

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1440
Semi-minor axis of confidence ellipse (meter) 714
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 13
Circular confidence region, given by single value of horizontal uncertainty (meter) 1440
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 189
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.25
Epicentral distance of station closest to the epicenter (degree) 0.09623
Epicentral distance of station farthest from the epicenter (degree) 0.64841
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 80771271
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-07-04 10:55:46
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SFI.EHZ. 2020-07-04T10:49:14.37 0.6 undecidable manual S 154 0.3552 120 0.12 49
IV.CRE.HHZ. 2020-07-04T10:49:13.06 0.1 undecidable manual P 159 0.6484 106 0.21 90
IV.RONT.HHZ. 2020-07-04T10:49:12.42 0.6 undecidable manual S 212 0.2716 128 0.22 48
IV.SEI.HHZ. 2020-07-04T10:49:12.20 0.3 undecidable manual S 229 0.2599 130 0.27 71
IV.VISG.HHZ. 2020-07-04T10:49:09.30 0.6 undecidable manual S 256 0.1466 147 -0.36 48
IV.FNVD.HHN. 2020-07-04T10:49:08.65 0.1 undecidable manual P 261 0.3696 119 0.23 93
IV.SFI.EHZ. 2020-07-04T10:49:08.03 0.6 negative manual P 154 0.3552 120 -0.18 47
IV.RUFI.EHZ. 2020-07-04T10:49:08.48 1.0 undecidable manual P 193 0.3966 117 -0.35 23
IV.RONT.HHZ. 2020-07-04T10:49:07.04 0.1 positive manual P 212 0.2716 128 0.01 100
IV.SEI.HHZ. 2020-07-04T10:49:06.59 0.3 undecidable manual P 229 0.2599 130 -0.28 71
IV.VISG.HHZ. 2020-07-04T10:49:05.32 1.0 negative manual P 256 0.1466 147 -0.25 25
IV.BRIS.HHZ. 2020-07-04T10:49:05.43 0.1 negative manual P 90 0.0962 157 0.26 98
IV.LMD.HHZ. 2020-07-04T10:49:05.23 0.1 negative manual P 160 0.1574 145 -0.44 93
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VISG.HHE. ML:1.7 0.000229 0.14 AML other m 2020-07-04T10:49:09.56
IV.VISG.HHN. ML:1.7 0.000216 0.1 AML other m 2020-07-04T10:49:09.84
IV.BRIS.HHN. ML:2.2 0.000902 0.28 AML other m 2020-07-04T10:49:10.25
IV.BRIS.HHE. ML:2.3 0.00104 0.14 AML other m 2020-07-04T10:49:10.18
IV.LMD.HHE. ML:2 0.000436 0.22 AML other m 2020-07-04T10:49:11.31
IV.LMD.HHN. ML:2.1 0.000619 0.14 AML other m 2020-07-04T10:49:11.44
IV.RONT.HHN. ML:2 0.0003255 1.2 AML other m 2020-07-04T10:49:13.35
IV.RONT.HHE. ML:2.3 0.00073 0.34 AML other m 2020-07-04T10:49:13.99
IV.SEI.HHN. ML:2.4 0.0008 0.28 AML other m 2020-07-04T10:49:14.31
IV.SFI.EHE. ML:1.5 8.965E-5 0.26 AML other m 2020-07-04T10:49:14.54
IV.SEI.HHE. ML:2 0.000313 0.52 AML other m 2020-07-04T10:49:14.30
IV.RUFI.EHE. ML:1.6 9.145E-5 0.38 AML other m 2020-07-04T10:49:15.13
IV.SFI.EHN. ML:1.5 9.545E-5 1.34 AML other m 2020-07-04T10:49:16.98
IV.RUFI.EHN. ML:1.6 9.65E-5 0.36 AML other m 2020-07-04T10:49:17.25
IV.CSNT.HHN. ML:1.4 2.655E-5 0.42 AML other m 2020-07-04T10:49:27.70
IV.CSNT.HHE. ML:0 3.735E-5 0.46 AML other m 2020-07-04T10:49:29.96
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download